- September 30, 2025: Frank Farris, 91¶ÌÊÓƵ,
- October 28, 2025: Tamsen McGinley, 91¶ÌÊÓƵ,
- December 2, 2025: Edgar Bering, San Jose State University, How many ways can you slice a doughnut?
- January 20, 2026: William Dunham, Bryn Mawr University,
- March 31, 2026: Nathan Kaplan, University of California, Irvine,